Yes, but my link also contained the follow-up story to the one you linked to. The FBI already checked this out and decided it wasn't worth investigating.
Is it possible that some Muslim knew in advance the attack were going to happen? Sure. But I think the search for those people would be helped if people actually had some concrete evidence instead of just posting variations on urban legends and things they heard on talk radio or from a "friend of a friend".
I agree. Attendance records of all employees in the buildings adjacent to the WTC that survived would be a good place to start. A serious inquiry by the FBI into the unplanned absence of all Muslims working in the vicinity of the WTC on 9-11 would be step two. You think I should hold my breath?